The primary objective of this study is to evaluate, through clinical parameters, the effectiveness of your medicine topic Maxinom ® (dexamethasone, neomycin and polymyxin B - Union Chemicals), comparing it to the topical medication Maxitrol ® (dexamethasone, neomycin and polymyxin B - Alcon ) by the percentage of improvement (sustained response rate) at the end of treatment, among the products studied.